The next generation of neutrino experiment, DUNE, searches for CP violation in the leptonic sector, to potentially explain the observed Matter-Antimatter asymmetry in the Universe. Such experiments also try to solve the neutrino mass hierarchy problem (m3>m2>m1 or m2>m1>m3?). For those purposes, large samples of neutrino-interaction events are needed which make it necessary to have large neutrino fluxes and large detector target masses.
The ArgonCube collaboration proposes an advanced approach for bulding Liquid Argon Time Projection Chambers (LArTPCs).
Two principal novelties of ArgonCube are a modular design and a fully pixelated charge readout. Splitting a large detector into independent modules allows for reduced requirements to drift potentials and argon purity which drastically reduces operation risks related to electric breakdown and purity losses, respectively. The pixelated charge readout provides an unambiguous event topology reconstruction, vital to prevent pile up in high multiplicity environments. The scintillation light contained within each module is used to provide precise timing information for neutrino events.
A key feature of the modular design is the scalability to a very large acitve detector mass. The following figure shows the design of the DUNE Near Detector, consisting of 4x5 modules, each filled with about 4200 kg of liquid Argon.